We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 previously unreported Feshbach resonances, including two very broad ones near 549 and 787 G. We measure the binding energies of several different dimer states by magnetic field modulation spectroscopy. We use least-squares fitting to these experimental results, together with previous measurements at lower field, to determine a six-parameter model of the long-range interaction potential, designated M2012. Coupled-channels calculations using M2012 provide an accurate mapping between the s-wave scattering length and the magnetic field over the entire range of fields considered. This mapping is crucial for experiments that rely on precise tuning of the scattering length, such as those on Efimov physics. ©2013 American Physical Society.

Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields / Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 87:3(2013). [10.1103/PhysRevA.87.032517]

Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields

Zenesini A.;
2013-01-01

Abstract

We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 previously unreported Feshbach resonances, including two very broad ones near 549 and 787 G. We measure the binding energies of several different dimer states by magnetic field modulation spectroscopy. We use least-squares fitting to these experimental results, together with previous measurements at lower field, to determine a six-parameter model of the long-range interaction potential, designated M2012. Coupled-channels calculations using M2012 provide an accurate mapping between the s-wave scattering length and the magnetic field over the entire range of fields considered. This mapping is crucial for experiments that rely on precise tuning of the scattering length, such as those on Efimov physics. ©2013 American Physical Society.
2013
3
Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.
Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields / Berninger, M.; Zenesini, A.; Huang, B.; Harm, W.; Nagerl, H. -C.; Ferlaino, F.; Grimm, R.; Julienne, P. S.; Hutson, J. M.. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 87:3(2013). [10.1103/PhysRevA.87.032517]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/344261
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 82
  • ???jsp.display-item.citation.isi??? 84
social impact